From 5576b82d15709560f326725abeb30db9e2a89ee9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Bourdeauducq?= <sb@m-labs.hk>
Date: Fri, 5 Apr 2024 12:51:33 +0800
Subject: [PATCH] nixbld: disable substituters

---
 nixbld-etc-nixos/configuration.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index d9c6490..ec1bab2 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -575,11 +575,11 @@ in
   boot.kernel.sysctl."kernel.dmesg_restrict" = true;
   services.udev.packages = [ pkgs.sane-backends ];
 
-  nix.settings.max-jobs = 10;
+  nix.settings.max-jobs = 4;
+  nix.settings.cores = 8;
   nix.nrBuildUsers = 64;
   services.hydra = {
     enable = true;
-    useSubstitutes = true;
     hydraURL = "https://nixbld.m-labs.hk";
     notificationSender = "hydra@m-labs.hk";
     minimumDiskFree = 15;  # in GB
@@ -693,6 +693,7 @@ in
     experimental-features = nix-command flakes
   '';
   nix.settings.extra-sandbox-paths = ["/opt"];
+  nix.settings.substituters = pkgs.lib.mkForce [];
 
   services.mlabs-backup.enable = true;
   services.ghbackup.enable = true;